Images for non LTS version can be downloaded here
In case of troubles booting, read this topic.
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UART has unusual speed: 1500000 Make sure to add large heatsink Powering related troubles are possible since USB Type-C is not PD-compliant
UART is accessible on a standard connector but with unusual speed: 1500000 If you don’t have USB Type-C PSU, you can power the board via pins 4 (5V) and 6 (GND) of the 40-pin GPIO1 header Powering related troubles are possible since USB Type-C is not PD-compliant. In fact you have to use dumb 5V PSU or …
Images below are for model C. For A (without wireless) can be downloaded here and for B here.How to install Armbian’s mainline u-boot into SPI and boot NVMe drivesHow to solve boot troubles with SPI enabled boards? (variant 2)